pin scikit-learn <=0.23.1 in environment.yml files

Author: basnijholt

docs/environment.yml

@@ -7,6 +7,7 @@ dependencies:
   - python
   - sortedcollections
   - scikit-optimize
+  - scikit-learn <=0.23.1  # because of https://github.com/scikit-optimize/scikit-optimize/issues/931, remove dep when fixed
   - scipy
   - holoviews
   - bokeh

environment.yml

@@ -16,5 +16,6 @@ dependencies:
   - jupyter_client>=5.2.2
   - ipywidgets
   - scikit-optimize
+  - scikit-learn <=0.23.1  # because of https://github.com/scikit-optimize/scikit-optimize/issues/931, remove dep when fixed
   - plotly
   - atomicwrites